The Coolant Gel Pack is a portable plastic bag filled with water, refrigerant gel, or liquid. To be prepared for use, the pack is first placed in a freezer. Tough, durable and recyclable polyethylene plastic material is used with heat-sealed seams to ensure puncture-resistance and to prevent tears and splitting. The packs are flat, square plastic bottles that are filled with water and cooled. These are filled with water and a chemical reactor. When the bag is squeezed, the water interacts with the chemical to start a reaction that lowers the temperature of the water to almost freezing. Coolant Gel Pack is very efficient.